PU (Polyurethane) lining is a protective coating applied to pump casings. It is used to improve resistance against wear, abrasion, corrosion, and chemical attack. This makes it ideal for pumps handling abrasive or corrosive fluids. The application process starts with thorough cleaning and surface preparation. A primer is then applied to ensure strong adhesion. After priming, the PU material is sprayed or cast uniformly onto the casing surface. Once cured, it forms a tough, elastic, and durable layer. This lining significantly extends the pump’s service life and reduces maintenance frequency. pu pump casting equipment in india pu pump casting in chennai pu pump casting manufacturers in tamilnadu.